1. Laser Chemistry Group, Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, 16502 Prague, Czech Republic, J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 18223 Prague, Czech Republic, Institute of Physics, Academy of Sciences of the Czech Republic, 18040 Prague, Czech Republic, and Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 25068 Řež near Prague, Czech Republic